Undefined references

[Mike Taylor]

Greetings,

I've just updated my Ubuntu 14.04 install to 16.04.  Now when  I build one of my 
applications that uses GStreamer-1.0 I get these errors:

/usr/lib/x86_64-linux-gnu/libgstvideo-1.0.so: undefined reference to `gst_segment_is_equal'

/usr/lib/x86_64-linux-gnu/libgstvideo-1.0.so: undefined reference to `gst_structure_get_flagset'

/usr/lib/x86_64-linux-gnu/libgstvideo-1.0.so: undefined reference to `gst_flagset_register'

Is there now some other GStreamer library that I must include.  Currently in my makefile

I have 

  `pkg-config gstreamer-video-1.0 gstreamer-1.0 gstreamer-app-1.0 glib-2.0 --libs`

Regards,

Mike

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[Tim Müller]

On Mon, 2017-08-14 at 19:39 -0700, Mike Taylor wrote:

Hi Mike,

> I've just updated my Ubuntu 14.04 install to 16.04.  Now when  I
> build one of my  applications that uses GStreamer-1.0 I get these
> errors:
>
> /usr/lib/x86_64-linux-gnu/libgstvideo-1.0.so: undefined reference to
> `gst_segment_is_equal'
> /usr/lib/x86_64-linux-gnu/libgstvideo-1.0.so: undefined reference to
> `gst_structure_get_flagset'
> /usr/lib/x86_64-linux-gnu/libgstvideo-1.0.so: undefined reference to
> `gst_flagset_register'

These look like recent additions to GStreamer.

What I suspect is happening is that you once upon a time built
GStreamer core from source, and there's an older libgstreamer-1.0.so
somewhere in a custom prefix or /usr/local/lib.

Try:

ldd /usr/lib/x86_64-linux-gnu/libgstvideo-1.0.so | grep libgstreamer

to see which one it picks up.

Cheers
 -Tim

--
Tim Müller, Centricular Ltd - http://www.centricular.com

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[yatinla]

Hi Tim,

Thanks, I found the old one in /usr/lib.  

Regards,

Mike